Help with identification of Intercom wiring

Hey folks. I'm having the hardest time identifying my intercom wiring as I try to automate it using a raspberry pi pico.

The case of the intercom says "Urmet 1133-DS001" however I think that's actually a red herring in this investigation. I think that because the labels on the case (see: 2, CA, 1) don't line up with the PCB. Also when searching for this model online pictures of the PCB are always different and include inputs for 6 wires.

The wiring here is 4 wires total in 2 pairs. White/Blue and Red/Black. Again I'm not sure if the colours matter.

There is a code on the PCB: cs1172-004 but that doesn't turn up anything significant in searches.

I might be over thinking this all together. Help please!

https://preview.redd.it/9nhejopwe63b1.png?width=1254&format=png&auto=webp&v=enabled&s=205ef2aeadec8226aac85015337e6ad08f78df35

Submitted by bizzyeml

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